Pantograph for marking or cutting boot or shoe patterns, &amp;c.



No'. 669,549. Patented Mar. I2, I90I.

T. ROCHE.

PANTUGRAPH FOR MARKING 0B CUTTING BOUT TIB SHUE PATTERNS, c.

(Appliuation filed Dec. 11, 1899.)

(no Nudel.) z sham-shear l vPatented Mar. I2, I9Ill, T. RDBHE. PAN'I'IJGRAPH F08 MARKING 0B CUTTING BUUT 0R SHUE PATTERNS, c.

I (Appeaein mea me. n, 1599.) (No Model.)

2 Sheets-Sheet 2.

juden/5i 'frans mit THOMAS ROCHE, OF 'LEICESTER, ENGLAND.

SPECIFICATION forming; part of Letters Patent No. 669,549, dated March 12, 1901.

Application filed December 11, 1899. Serial No. 739,983. (No model.)

`T0 all whom t 717,614/ concern:

Beit known that I, THOMAS ROCHE, a subject ofthe Queen of England, and a resident of No. 24 GuthlaXton street, Leicester, in the county of Leicester, England,have invented an Improved Pantograph for Marking or Cutting Boot or Shoe Patterns and other Designs, of which the following is a specification.

My invention relates to an improved pantograph for marking or cutting boot and shoe patterns and other designs in which a central arm is fulcrumed to a table or plate, the forward part of said arm, together With one or more arms parallel thereto, being pivoted to a front cross-arm carrying a tracing-point which is moved around and in contact with the stock pattern or design by the operator.

The distance between the fulcrum of the eentral arm and the front cross-arm is fixed; but the parts of the central arms rearward of the fulcrum are capable of adjustment, and they are pivoted at their rear ends to a rear crossarm likewise capable of adjustment; and the objects of my improvement are to provide a pantograph, rst, capable ofproducing at its rear end a facsimile or a larger or smaller diagram or pattern of the stock, and, second, to produce dierential diagrams of the stockthat is to say, produce a diagram, forinstance, of a largersole in which the required eXtra length and the slight eXtra width are given and the correct outline produced. I attain these-objects by the apparatus illustrated in the accompanying drawings, in which- Figure 1 is a top view of the entire apparatus. Fig. 2 is a section along the line Z Z of Fig. 1, showing how the stock is supported in position. Fig. 3 isa vertical section through the fulcrum. Figs. 4, 5, 6, and 7 are sectional detail views showing how the arms are pivoted. Fig. 8 is a sectional elevation, showing the sheet of glass over which the paper is drawn on which the diagrams or patterns are produced. Fig. 9 is a View illustrating the scale and showing'the two parts of the adjustable arms fixed at Zero. Figs. 10, 11, and

12 are details, respectively, of the tracingpoint, cutting-knife, and holder therefor and the instrument by which the diagram is marked. Fig. 13 illustrates the grade by which the operator must work when producing a larger or smaller last than the stock.

Si milar letters refer to similar parts throughout the several views.

The table or plate A has an opening, approximately central, in which is placed a flanged bush B, carrying therein the ballbearings C C', respectively, so that the spindle D, which passes downward through the said bearings O C', may have freedom of movement with as little friction as possible. The said spindle D has a flange D', connected by screws to the under side of the central arm b. The said arm l) and the arms a c, parallel thereto, are preferably alike in all respects, each of the said arms being grooved or recessed at d' b' c', respectively, so that the rear parts a2 b2 c2 may be adj usted therein. The front cross-arm E is pivoted at E' E2 to the central arms l) c, respectively, by the pins F, (see Figs. 1 and 5,) and the near end of the said arm E carries the holder G', into which is driven the tracing-point G. The latter is reduced at G2, so that the enlarged part G2 may rest upon the stock H when the point G2 is being traversed around the edge of the said stock H by the operator. The rear parts a2 b2 c2 of the arms a b c, respectively, are pivoted to the rear cross-arm J at J' J2 J2, the said arm J being grooved or recessed at J4, so that the rear part J5 may be adjusted therein. The holder K is mounted in the end of the arm J5, (see Figs. 1 and 11,) its lower end being' bored at K' to receive therein the marking instrument L or the collet L', which also is bored up its under side to receive the stalk M' of the cutter M, the latter thereby being free to turn. The stock H (see Figs. 1 and 2) is supported by bolts H' H' above a plate H2, provided with slots H3, so that the'said supporting-bolts H' H' may be readily moved to hold and support stocks of other shapes and sizes. The instrument L or knife M, before mentioned, travels over a sheet of glass N, secured to the table or plate A by screws N'. An opening A' is cut through '2 the said table, so that the paper O (shown by the dot and dash lines, Fig. 8) may be drawn upward and over the surface of the glass and held at its front end by a spring-clip P, having coils around the pins P of the brackets P2, fixed to the table A. The roller Q, carried by the spring-plates Q', bears against the paper O as it leaves the roll O and holds it stationary at that end.

As shown in Figs. 1 and 9, the adjustable arms of the apparatus are set at zero, and when in this position the instrument L or knife M will produce a facsimile of the stock H (shown in Figs. 1 and 2)-75. e., a four-size last; but to produce a five-size last the movable part J5 of the arm J must be moved outward until the line P comes in a line with the division on the scale marked 2&2 and the lines P on the arms a2 b2 c2 to the division on the scale marked 29;. T-he armsare retained in position after adjustment by the thumbscrews R, (see Figs. Land 6,) which are tightened on the pins R', the latter being movable along the slots formed in the several arms.

In Fig. 7 an inverted cup S is shown threaded on the pin F', the lower part of t-he cup partially inclosing a ball S. After the ball is `placed in the cup the lower edge of the latter is slightly closed over the ball to hold it in position, thus forming a ball-caster. A caster of this nature may be placed on the pins F F at opposite corners of the apparatus. (See Fig. l.)

The grade shown in Fig. 13 is an illustration only and does not purport to be adapted to every use to which the apparatus may be applied, different grades being requisite for various purposes and supplied accordingly. By using such a scale as shown in Fig. 9 on all the adjustable arms the apparatus is complete for any purpose, the grades only differing.

' 1. A pantograph for dierentially grading diagrams from a stock-pattern comprising a fnlcrumed central arm of a fixed length for- Ward of the fulcrum and arms parallel thereto, their forward ends being pivotally con- 4 nected to a front cross-arm carrying a tracing-point 'which is moved around the stock pattern or design, the central and parallel arms comprising parts adjustable in unison, one part of each of the said arms having a scale thereon and the other orrear part of said arms provided With an indicator-mark and pivotally connected to a rear cross-arm with adj ustable parts, one part having a scale thereon and the other or rear part being provided with an indicator-mark, the farther end of said cross-arm carrying the instrument or cutting-knife for marking or cutting the diagram, substan tially as described.

2. In a pantograph the combination of a plurality of arms pivotally connected so that arms on opposite sides are at all times parallel with each other, one-of the said arms carryin'g a tracing-point located at its forward end, and an arm parallel thereto carrying a marking instrument or cutting-knife located at its outer end, a central cross-arm said central arm and arms parallel thereto comprising parts adjustable in unison and connecting the two cross-arms and a pivotal support for said central cross-arm, substantially as described.

3. In a pantograph the combination of parallel arms a, 6,0, each of said arms having an adjustable part provided with an index, a pivotal support for the arm b, an arm E and arm J parallel thereto, the arm J having an adjustable part provided with an index, the scales on the arms a, b, c, and J all corresponding, substantially as described.

4. In a pantograph the combination of a fulcrumed central arm, arms parallel thereto l and all having parts adjustable in unison and one part pivoted to a front cross-arm carrying a tracing-point movable by the operator around the stock pattern or design, a rear cross-arm having adjustable parts, one part being pivotally connected to the central arms and the other part carrying the instrument or knife for marking or cutting the diagram, and a sheet of glass over Which the paper is drawn upon Which the diagram is marked or cut substantially as described.

In testimony whereof I` have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS ROCHE.

Witnesses:

THOMAS SIDNEY SHOULER, FRANK WEST. 

